CN209516769U - Rotor and motor - Google Patents
Rotor and motor Download PDFInfo
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- CN209516769U CN209516769U CN201920307896.6U CN201920307896U CN209516769U CN 209516769 U CN209516769 U CN 209516769U CN 201920307896 U CN201920307896 U CN 201920307896U CN 209516769 U CN209516769 U CN 209516769U
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- permanent magnet
- magnet
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Abstract
The utility model discloses a kind of rotor and motors, comprising: rotor body is equipped with multiple magnet insertion grooves, the corresponding magnetic pole of each magnet insertion groove in the circumferential；Multiple permanent magnets are set in magnet insertion groove, and to contain at least two permanent magnet in each magnet insertion groove；In each magnet insertion groove, the coercivity value of each permanent magnet is not same numerical value, the utility model is not by being the magnet that same numerical value places high-coercive force on easily demagnetization position in the coercivity value that multiple permanent magnets and each permanent magnet is arranged in magnet insertion groove, and adjust the width dimensions cooperation of variant coercivity permanent magnet, the anti-demagnetization performance for improving motor, to improve the efficiency of motor.
Description
Technical field
The utility model relates to a kind of technologies of motor field, more specifically, be related to a kind of rotor and
Motor.
Background technique
Currently, in high speed operating range, in high efficiency electric rotor, to promote the expansion speed range of motor and promoting effect
Rate is typically chosen the rotor of built-in magnet structure, has monolithic or the insertion of muti-piece permanent magnet trough along diameter under each magnetic pole
To or arranged tangential permanent magnet, and the magnet isolation tank quantity shape of interpolar through reasonable settings, or by adjusting rotor
The shape of outer rim, to ensure motor while possessing higher efficiency, but also with lower cost and good noise and
Vibration characteristics.
There is following motors with the progress of control technology and the development of permanent magnet material industry in recent years
Rotor: rotor is made of two pieces or two pieces or more of magnet, by the pulse current in stator winding, to realize to magnet
The adjusting of magnetic property.In turn, motor has high back-emf in low-speed running, and input current reduces, and realizes mentioning for efficiency
It rises, when running at high speed, has low back-emf, realize the expansion of the range of speeds.So that motor is in whole service section,
Always has higher efficiency, while but also with big expansion speed range.But permanent magnet by electric current, temperature rise etc. in motor influence compared with
Greatly, the portion of permanent magnet is caused to be easy to happen demagnetization.
Utility model content
In view of the problems of the existing technology, the purpose of this utility model is to provide a kind of rotor and motor,
Coercivity value by the way that multiple permanent magnets and each permanent magnet are arranged in magnet insertion groove is not same numerical value i.e. in easily demagnetization position
The magnet for placing high-coercive force is set, and adjusts the width dimensions cooperation of variant coercivity permanent magnet, the anti-of motor is improved and moves back
Magnetic property, to improve the efficiency of motor.
One aspect according to the present utility model provides a kind of rotor, comprising:
Rotor body is equipped with multiple magnet insertion grooves, the corresponding magnetic pole of each magnet insertion groove in the circumferential；
Multiple permanent magnets are set in magnet insertion groove, and to contain at least two forever in each magnet insertion groove
Magnet；
In each magnet insertion groove, the coercivity value of each permanent magnet is not same numerical value；
It include the first permanent magnet and the second permanent magnet in the magnet insertion groove, the width range of first permanent magnet isWherein, L is the width of magnet insertion groove, and L1 is the width of the first permanent magnet.
Preferably, the coercitive ratio range of the coercivity of first permanent magnet and the second permanent magnet is 1.05~3.
It preferably, include the first permanent magnet, the second permanent magnet and third permanent magnet, and institute in the magnet insertion groove
State the width range of the first permanent magnetThe width range of third permanent magnet isWherein,
L is the width of the magnet insertion groove, and L1 is the width of first permanent magnet, and L3 is the width of the third permanent magnet.
Preferably, the first permanent magnet, the second permanent magnet and third permanent magnet are set in turn in the magnet insertion groove.
Preferably, the coercitive ratio range of the coercivity of first permanent magnet and the second permanent magnet is 1.05~3,
The coercivity of the third permanent magnet and the coercitive ratio range of the second permanent magnet are 1.05~3.
Preferably, the coercivity of the coercivity of the third permanent magnet and first permanent magnet is equal.
One aspect according to the present utility model provides a kind of motor, which is characterized in that including above-mentioned rotor.
The beneficial effect of above-mentioned technical proposal is:
The utility model is not same by the coercivity value that multiple permanent magnets and each permanent magnet are arranged in magnet insertion groove
One numerical value is the magnet that high-coercive force is placed on easily demagnetization position, and the width dimensions for adjusting variant coercivity permanent magnet are matched
It closes, the anti-demagnetization performance of motor is improved, to improve the efficiency of motor.
Other features and advantages of the utility model and the various embodiments of the utility model structurally and operationally, will be
It is described in detail referring to the drawings.It should be noted that the utility model is not limited to specific embodiments described herein.At this
The purpose that these embodiments that text provides are merely to illustrate that.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon.
Fig. 1 is a kind of rotor of motor and the cooperation schematic diagram of stator；
Fig. 2 is the structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 1；
Fig. 3 is another structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 1；
Fig. 4 is the structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 2.
List of numerals:
10 rotors
11 magnet insertion grooves
12 rotor bodies
20 stators
21 first permanent magnets
22 second permanent magnets
41 first permanent magnets
42 second permanent magnets
43 third permanent magnets
From the detailed description below in conjunction with attached drawing, the feature and advantage of the utility model will be apparent.Run through
Attached drawing, identical attached drawing identify respective element.In the accompanying drawings, same reference numerals are indicated generally at identical, functionally similar
And/or similar element in structure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
" first ", " second " used in the disclosure and similar word are not offered as any sequence, quantity or again
The property wanted, and be used only to distinguish different component parts.The similar word such as " comprising " or "comprising" means before there is the word
The element or object in face are covered the element for appearing in the word presented hereinafter or object and its are equal, and are not excluded for other elements
Or object." connection " either the similar word such as " connected " is not limited to physics or mechanical connection, but can be with
It is either direct or indirect including electrical connection."upper", "lower", "left", "right" etc. are only used for indicating relative position
Relationship, after the absolute position for being described object changes, then the relative positional relationship may also correspondingly change.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
Embodiment 1
Fig. 1 is a kind of rotor of motor of the utility model and the cooperation schematic diagram of stator.The motor is in rotor
The embedded motor of permanent magnetism of permanent magnet (permanent magnet) is embedded in 10.
Motor shown in fig. 1 includes: rotor 10 and stator 20, rotor 10 can wear in rotary manner with
The center of stator 20.There are gaps between stator 20 and rotor 10.Stator 20 includes iron core and coiling, wherein
Iron core is by being formed with a thickness of multiple steel plates of 0.2-0.5mm by squeezing or riveting fastening in rotary axis direction.
With reference to Fig. 1, rotor 10 includes rotor body 12 and the multiple magnet insertion grooves for being set to rotor body 12
11, each magnet insertion groove 11 is along the axially extending of rotor body 12 and runs through entire rotor body 12, magnet insertion groove 11
In be inserted into permanent magnet to form magnetic pole.Magnet insertion groove 11 in rotor body 12 rotational symmetry centered on rotary shaft,
I.e. each magnetic pole is also the rotational symmetry centered on rotary shaft.Specifically, comprising there are six magnet in rotor body 12 in Fig. 1
Insertion groove 11, magnet insertion groove 11 is successively end to end and is uniformly distributed in the circumferential direction of rotor body 12, constitutes one
Regular hexagon is inserted with permanent magnet in each magnet insertion groove 11, forms the array of magnetic dipoles of hexagonal arrangement.In addition,
Magnet insertion groove 11 on rotor body 12 is not limited to six, generally more than two magnet insertion grooves 11.
The permanent magnet for being set to magnet insertion groove 11 is the flat part for being length in axial direction (axial direction of rotor body 12)
Part has width in the circumferential direction of rotor body 12, radially has thickness in rotor body 12.Permanent magnet is by such as neodymium
(Nd), iron (Fe) and boron (B) rare earth element magnet as main component are constituted.Permanent magnet is magnetized in a thickness direction, i.e. magnetic
Radial direction of the magnetic pole of permanent magnet in iron insertion groove 11 towards rotor body 12.It is arranged between two adjacent magnet insertion grooves 11
There is magnetic flux barrier, the leakage magnetic flux between magnetic pole for inhibiting adjacent flows through the magnetic flux between magnetic pole.
Fig. 2 is the structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 1.Fig. 2 shows rotor body 12 in magnet
Two permanent magnets are provided in insertion groove 11, the width of two permanent magnets differs, and the coercivity of two permanent magnets is different.
Coercivity (coercive force) refers to magnetic material after saturated magnetization, its magnetic induction intensity when external magnetic field returns to zero
B does not fall back on zero, only can just magnetic induction intensity be made to return to zero plus a certain size magnetic field in former magnetizing field opposite direction,
The magnetic field is known as coercive field.Specifically, being provided with the first permanent magnet 21 and second in magnet insertion groove 11 shown in Fig. 1 forever
Magnet 22, the first permanent magnet 21 are arranged in the right end of magnet insertion groove 11, and the second permanent magnet 22 is arranged in the magnet insertion groove 11
Left end, the first permanent magnet 21 and the second permanent magnet 22 are affixed, to form a complete magnetic in the magnet insertion groove 11
Pole.When the electric current flowed through in the coil of stator 20 is excessive or when the phase of electric current changes, stator 20 can generate a magnetic
Lead to and act on permanent magnet, when electric current be more than certain threshold value when, can make permanent magnet the direction of magnetization occur reversion and can not
Back to original state, this phenomenon is phenomenon of demagnetizing.The both ends of magnet insertion groove 11 in Fig. 2 are exactly to be easy to happen demagnetization
Region.In order to reduce demagnetization phenomenon, the coercivity of the first permanent magnet 21 is improved, i.e., the coercivity of the first permanent magnet 21 is greater than the
The coercivity of two permanent magnets 22 can thus be effectively reduced the demagnetization possibility of the first permanent magnet 21.
In some embodiments, coercitive range of the permanent magnet at 20 DEG C be 1900kA/m~3000kA/m, i.e., first
The coercitive range of permanent magnet 21 and the second permanent magnet 22 is 1900kA/m~3000kA/m.Also, the first permanent magnet 21
The coercitive ratio range of coercivity and the second permanent magnet 22 is 1.05~3.The width of magnet insertion groove 11 shown in Figure 2
Width range for L, and the first permanent magnet 21 isWherein, L1 is the width of the first permanent magnet 21.Accordingly
, the width L2 of the second permanent magnet 22 is L-L1.The width L1 of first permanent magnet 21 is limited inModel
When enclosing interior, it may be possible to while most effective reduction demagnetization possibility, also be able to maintain the whole efficiency of motor.
Fig. 3 is another structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 1.Rotor body 12 shown in Fig. 3
Structure and Fig. 2 shows the difference of structure of rotor body 12 be: the first permanent magnet 21 is provided in magnet insertion groove 11
With the second permanent magnet 22, the first permanent magnet 21 is arranged in the left end of magnet insertion groove 11, and the second permanent magnet 22 is arranged in the magnet
The right end of insertion groove 11, the first permanent magnet 21 and the second permanent magnet 22 are affixed, to form one in the magnet insertion groove 11
Complete magnetic pole.Rotor body 12 shown in Fig. 3 is by the suitable of the first permanent magnet 21 shown in Figure 2 and the second permanent magnet 22
Sequence is exchanged, and is equally reached the probability for reducing demagnetization in this way, and improve electric efficiency.
Embodiment 2
Fig. 4 is the structural schematic diagram of the a-quadrant in Fig. 1 in embodiment 2.The magnet in rotor body 12 shown in Fig. 4
Three permanent magnets are provided in insertion groove 11, the width of three permanent magnets differs, and the coercivity of three permanent magnets is different.
Specifically, being provided with the first permanent magnet 41, the second permanent magnet 42 and third permanent magnet in magnet insertion groove 11 shown in Fig. 4
43 third permanent magnets 43, the first permanent magnet 41, the second permanent magnet 42 and third permanent magnet are arranged successively in magnet insertion groove 11,
I.e. the second permanent magnet 42 is between the first permanent magnet 41 and third permanent magnet 43.In order to reduce demagnetization phenomenon, first is improved forever
The coercivity of magnet 41 and third permanent magnet 43, the i.e. coercivity of the first permanent magnet 41 are greater than the coercivity of the second permanent magnet 42,
The coercivity of third permanent magnet 43 can thus be effectively reduced the first permanent magnetism also greater than the coercivity of the second permanent magnet 42
The demagnetization possibility of body 41 and the second permanent magnet 42.
The coercitive range of first permanent magnet 41, third permanent magnet 43 and the second permanent magnet 42 be 1900kA/m~
3000kA/m (at 20 DEG C).Also, the coercitive ratio range of the coercivity of the first permanent magnet 41 and the second permanent magnet 42 is
1.05~3, the coercitive ratio range of the coercivity of third permanent magnet 43 and the second permanent magnet 42 is 1.05~3.First forever
The coercitive ratio of the coercivity of magnet 41 and the second permanent magnet 42 can be with the coercivity of third permanent magnet 43 and second forever
The coercitive ratio of magnet 42 is unequal.The coercivity of first permanent magnet 41 and the second permanent magnetism coercivity can be equal.
The width of magnet insertion groove 11 shown in Fig. 4 is L, and the width range of the first permanent magnet 41 isThe range of the width of third permanent magnet 43 isWherein, L1 is the first permanent magnet 41
Width, L3 be third permanent magnet 43 width.Correspondingly, the width L2 of the second permanent magnet 42 is L-L1-L3.Forever by first
The width L1 of magnet 41 is limited inIn the range of and the width L3 of third permanent magnet 43 be limited inIn the range of, it may be possible to while most effective reduction demagnetization possibility, also it is able to maintain motor
Whole efficiency.
It to sum up, is not same numerical value by the coercivity value that multiple permanent magnets and each permanent magnet are arranged in magnet insertion groove
The magnet of high-coercive force is placed on easily demagnetization position, and adjusts the width dimensions cooperation of variant coercivity permanent magnet, is mentioned
The anti-demagnetization performance of high motor, to improve the efficiency of motor.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (7)
1. a kind of rotor characterized by comprising
Rotor body is equipped with multiple magnet insertion grooves, the corresponding magnetic pole of each magnet insertion groove in the circumferential；
Multiple permanent magnets are set in magnet insertion groove, and to contain at least two permanent magnet in each magnet insertion groove；
In each magnet insertion groove, the coercivity value of each permanent magnet is not same numerical value；
It include the first permanent magnet and the second permanent magnet in the magnet insertion groove, the width range of first permanent magnet isWherein, L is the width of the magnet insertion groove, and L1 is the width of first permanent magnet.
2. rotor according to claim 1, which is characterized in that the coercivity and the second permanent magnetism of first permanent magnet
The coercitive ratio range of body is 1.05~3.
3. rotor according to claim 1, which is characterized in that further include third permanent magnetism in the magnet insertion groove
Body, and the width range of the third permanent magnet isWherein, L is the width of the magnet insertion groove,
L1 is the width of first permanent magnet, and L3 is the width of the third permanent magnet.
4. rotor according to claim 3, which is characterized in that first permanent magnet, second permanent magnet and
The third permanent magnet is set in turn in the magnet insertion groove.
5. rotor according to claim 4, which is characterized in that the coercivity and the second permanent magnetism of first permanent magnet
The coercitive ratio range of body is 1.05~3, the coercivity of the third permanent magnet and the coercitive ratio of the second permanent magnet
Being worth range is 1.05~3.
6. rotor according to claim 5, which is characterized in that the coercivity of the third permanent magnet and described first
The coercivity of permanent magnet is equal.
7. a kind of motor, which is characterized in that including the rotor as described in claim 1 to 6 is any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920307896.6U CN209516769U (en) | 2019-03-12 | 2019-03-12 | Rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920307896.6U CN209516769U (en) | 2019-03-12 | 2019-03-12 | Rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209516769U true CN209516769U (en) | 2019-10-18 |
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ID=68205202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920307896.6U Active CN209516769U (en) | 2019-03-12 | 2019-03-12 | Rotor and motor |
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| Country | Link |
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| CN (1) | CN209516769U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117846A (en) * | 2019-06-19 | 2020-12-22 | 上海海立电器有限公司 | Special-shaped permanent magnet structure of motor rotor and compressor |
| CN112491177A (en) * | 2020-12-10 | 2021-03-12 | 华中科技大学 | Anti-demagnetization rotor and MW-level permanent magnet synchronous wind driven generator |
| CN113410933A (en) * | 2021-06-28 | 2021-09-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Design method of motor rotor, motor rotor and double-winding motor |
-
2019
- 2019-03-12 CN CN201920307896.6U patent/CN209516769U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117846A (en) * | 2019-06-19 | 2020-12-22 | 上海海立电器有限公司 | Special-shaped permanent magnet structure of motor rotor and compressor |
| CN112491177A (en) * | 2020-12-10 | 2021-03-12 | 华中科技大学 | Anti-demagnetization rotor and MW-level permanent magnet synchronous wind driven generator |
| CN113410933A (en) * | 2021-06-28 | 2021-09-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Design method of motor rotor, motor rotor and double-winding motor |
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